Be inspired by this website to make some hidden art in a place that is not your own.

To clarify, secretwalltatoos.com displays works of art (paintings and drawings) that lie hidden behind objects such as mirrors, photographs, and paintings. Hiding such art - on the wall, and not in your home or place or business - is your goal

1) Contact Ariadne. (Ariadne can be a friend, a friend of a friend, or an Ariadne chosen at random from a phone directory.)
2) Ask her for a list of her ten favorite places in the city (or as many as she is willing to share).

3) Plot these places on a map and draw a line between them.

4) Follow Ariadne's thread. Watch out for the Minotaur on your journey.

Pack enough for a night and a day and head to a transportation hub, like an airport, train station or bus stand. Head into the city and rent a room or bed at a hotel or hostel. Stay the night, and the next day, indulge yourself in the tourist activities of your city.

Conglomerate with other tourists as much as possible.

Do not, for any reason whatsoever, reveal that you are a local or anything but a tourist.

Find a building which is in active use. Explore it thoroughly and get to know its secrets.

Politely talking your way into the heart of the building is an excellent way to understand its psychogeography, and see how it affects those who occupy it. Your interactions with the building's owners and inhabitants (employees, residents, etc) are to be strictly positive; recruiting the authorities as guides is a far, far better thing than being ejected by them.

Completing this task in proper exploring attire, which may include such accoutrements as a waistcoat or a monocle, will likely result in additional votes.

In Maori culture, when you formally introduce yourself in a meeting house it is called a "Mihi". You tell people your canoe, tribe, sub-tribe and family, but you ALSO identify specific geological features to which you "belong". For example, "your" lake, mountain, river, forest etc.

Chose at least three geographical features that you consider "yours". Document them.

With the help of your neighbors, make a map of your neighborhood. Include as much local knowledge as you can.

For example: where does it smell nice? Where do panhandlers set up? Where do people tend to stop and chat? Where do you need to watch for broken sidewalks or dog piles? What's the name of the man who runs that sandwich shop or corner store?

Go on a walking journey and every fifteen feet draw a chalk arrow in the direction you're going. At the end of the trip, leave a big pile of chalk so a stranger can continue your journey.

OR

Walk a short route alone, then send a collaborator the last segment of your trip so that they can pick up where you left off. You may complete this in separate cities by using more generic instructions (e.g. walk three blocks, then turn left). Finally, walk the complete route you and your collaborators have created.